Using battery power to go off the City's power grid

You should realize that the power coming into your house qualifies as "perfect sine wave" yet it has (at my house) 4-5% THD.  

I am familiar with PS Audio power regenerators.  They analyze the power in with a scope and give you a THD reading for the incoming power.  

It would be extremely helpful if someone could power a PSA regenerator from some of the highly touted battery systems with "perfect sine wave" inverters and publish the actual THD numbers.  

Until then I'll remain skeptical.  Anyone who calls their power "perfect" is pretty much by definition lying.  But modern marketing practices allow it.

Jerry

@sns Power out of my PSAudio regenerator is always 119.9 vac.  voltage in is generally pretty good but this summer with high air conditioner use in SoCal it is often 115vac. I've also seen 122V.  I too have a monitor plugged into an outlet on the counter. 

Tube amps love the same voltage every day, so I'm glad I got the PP10.

Jerry

@ I used one of early PSAudio regenerators many years ago, ended up much preferring my transformer based PC. Mine was one of the lower power PS, used only on front end components. Perhaps the newer PSAudio devices much better than previous generations.

I have yet to find satisfactory PC for amps and I've tried many. If battery power doesn't blunt transients could be well worth it. I don't recall blunting of transients with my N.E.W., so assume can be done.

@carlsbad, no need to spend money on a PS unit to measure THD. There is lot of test equipment that can do this, probably with more accuracy. You need to test it with real load as well, such as an amp with a linear supply. Most other equipment barely requires any power except tube pre-amps and some processors.

@theaudioamp I suggested the PS Audio unit because that is something many people here own and the test data will be consistent.  The level of electrical knowledge here is generally not very high so buying test equipment and using it competently is not likely a plan that will lead to useful data.